Timing for electronic ignition upgrade

"Bump the timing"

NOT TRUE. (Unless the old one was set retarded LOL)

The one thing to remember when playing with timing is what is mechanical TOTAL timing? This is when you have the foot to the floor, which dumps all vacuum advance, and the result is initial + mechanical. So when you "bump up" the initial, you also move TOTAL and THAT number is what can damage your engine the most

As someone said, you may need to recurve

REMEMBER THIS ALWAYS. Federal emissions laws started in 68, and got worse every year, and started in CA in 66. So ANY car, 68 or later, has a longer slower advance curve. By say, 72-73 it was quite bad. THAT IS UNLESS you buy a Mopar performance kit or distributor (which has an adjustable curve). ANY stock breakerless Mopar dist. is going to have a smog slow, long advance curve